Compositions and processes for adhering polyolefins to surfaces



United States Patent 3,477,901 COMPOSITIONS AND PROCESSES FOR ADHERING POLYOLEFINS TO SURFACES Joseph W. Keil, Midland, Mich., assignor to Dow Corning Corporation, Midland, Mich, a corporation of Michigan No Drawing. Filed May 10, 1963, Scr. No. 279,592 Int. Cl. B32b 13/12; C09j 3/00 US. Cl. 161208 1 15 Claims This invention relates to compositions and processes for adhering polyolefins to various surfaces.

Prior attempts to bond polyolefins to various surfaces have been unsuccessful, not only because the initial bond strength between the polyolefin and the substrate is low, but in particular because the hydrolytic stability of the bond is very poor.

It has been found in accordance with this invention that when certain compositions are applied to the substrate to which the polyolefin is to be bonded, not only is the initial bond strength increased, but also the hydrolytic stability of the bond is increased markedly.

More particularly, applicant has discovered a process for adhering a polyolefin to a substrate which comprises applying to the substrate a composition in liquid form consisting essentially of a mixture of (1) a silane having the general formula wherein:

R is a divalent hydrocarbon radical free of aliphatic unsaturation and containing at least 3 carbon atoms,

Z is a member selected from the group consisting of hydrogen atoms and substituted monovalent hydrocarbon groups containing at least one H N-group and being free of aliphatic unsaturation,

R is a member selected from the group consisting of alkyl groups containing 1 to 4 carbon atoms, and the CH2CH2OH, and

CH CH OCH CH groups, 1 R is a member selected from the group consisting of monovalent hydrocarbon groups free of aliphatic unsaturation and fluorinated monovalent hydrocarbon groups free of aliphatic unsaturation in which all of the fluorine atoms are attached to at least the third carbon atom removed from the silicon atom,

a is an integer from O to 2 inclusive, and the Z N-- group is attached to at least the third carbon atom removed from the silicon atom, and (2) a member selected from the group consisting of monocarboxylic acids and silanes having the general formula RSi(OR) wherein R is a member selected from the group consisting of alkyl groups containing 1 to 18 carbon atoms and the phenyl group and R is as defined above, drying the substrate and bonding the polyolefin to the substrate.

Applicant has also discovered a process for adhering a polyolefin to a substrate which comprises applying to the substrate a composition in liquid form consisting essentially of a mixture of (1) a silane having the general formula RI! Y NRSi( 0 Ro wherein:

R is a divalent hydrocarbon radical free of aliphatic unsaturation and containing at least 3 carbon atoms,

Y is a member selected from the group consisting of hydrogen atoms, amino-substituted monovalent hydrocarbon groups free of aliphatic unsaturation and monovalent hydrocarbon groups,

R is a member selected from the group consisting of alkyl groups containing 1 to 4 carbon atoms, and the -CH CH OH, CH CH OCH and groups,

R" is a member selected from the group consisting of monovalent hydrocarbon groups free of aliphatic unsaturation and fluorinated monovalent hydrocarbon groups free of aliphatic unsaturation in which all of the fluorine atoms are attached to at least the third carbon atom removed from the silicon atom,

a is an integer from 0 to 2 inclusive, and the Y N-- group .is attached to at least the third carbon atom removed from the silicon atom, and t (2) sodium monomethylsiliconate, drying the substrate and bonding the polyolefin to the substrate.

It has further been found in accordance with this invention that the following compositions are useful for adhering polyolefins to various substrates and forming a hydrolytically stable bond:

(A) A composition consisting essentially of (1) a silane having the general formula RU ZzN-R-S'KORQ wherein:

R is a divalent hydrocarbon group free of alphatic unsaturation and containing at least 3 carbon atoms,

Z is a member selected from the group consisting of hydrogen atoms and substituted monovalent hydrocarton groups containing at least one H N group and being free of aliphatic unsaturation,

R is a member selected from the group consisting of alkyl groups containing 1 to 4 carbon atoms, and the CH CH OH, -CH CH OCH and groups,

R is a member selected from the group consisting of monovalent hydrocarbon groups free of aliphatic unsaturation and fiuorinated monovalent hydrocarbon groups free of aliphatic unsaturation in which all of the fluorine atoms are attached to at least the third carbon atom removed from the silicon atom,

a is an integer from 0 to 2 inclusive and the Z N- group is attached to at least the third carbon atom removed from the silicon atom, and

(2) a silane having the general formula R"Si(OR) wherein R is a member selected from the group consisting of alkyl groups containing 1 to 18 carbon atoms and the phenyl group, and

R is as above defined.

(B) A composition consisting essentially of (1) a silane having the general formula Y is a member selected from the group consisting of hydrogen atoms, amino-substituted monovalent hydrocarbon groups free of aliphatic unsaturation and monovalent hydrocarbon groups,

R, R, R and a are as defined above and the Y N- group is attached to at least the third carbon atom removed from the silicon atom, and

(2 sodium monomethylsiliconate.

In the above formulae, for example, R can be any divalent hydrocarbon radical free of aliphatic unsaturation such as CH CH CH CH cyclopentylene, CH CH CH CH CH C H or -C H Z can be (in addition to hydrogen) H NCH CH H NCH CH CH CH CH H NC H or an aminotolyl group; R can be a methyl, ethyl, propyl, isopropyl, butyl, isobutyl, CH CH OH, CH CH OCH or -CH CH OCH CH group; R can be any monovalent hydrocarbon group or fluorinated monovalent hydrocarbon group free of aliphatic unsaturation such as a methyl, ethyl, propyl, isopropyl, butyl, isobutyl, pentyl, octyl, decyl, dodecyl, octadecyl, phenyl, tolyl, benzyl, xenyl, naphthyl, cyclohexyl, cyclopentyl, CF CH CH or CF C H group; R can be phenyl or an alkyl group such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, pentyl, hexyl, heptyl, octyl, decyl, dodecyl or an octadecyl and Y can be any amino-substituted hydrocarbon group such as the groups mentioned for Z above, and any monovalent hydrocarbon group such as methyl, ethyl, propyl, isopropyl, amyl, vinyl, allyl, octadecyl, cyclohexyl, phenyl, xenyl, tolyl or a benzyl group.

With respect to the first process set forth above, the relative proportion of the silane (1) and the compound (2) will vary depending on the particular compound selected from (2). Generally speaking, when (2) is a monocarboxylic acid, the amount of acid employed can range from one-third the stoichiometric amount needed to form the salt of the amino compound to 3 times the stoichiometric amount needed to form the salt. It is preferred, however, that the amount of acid be in the range from the stoichiometric amount to twice the stoichiometric amount. When (2) is a silane the mole ratio of (1) to (2) should be in the range of 2:1 to 1:3 and preferably in the range of 1:1 to 1:2. A mixture of an acid and the silane can also be used when this is done the ratio of each to (1) as set forth above should still be maintained.

In the composition (B) the relative proportion of (1) to (2) should be such that the mole ratio of (1) to (2) is in the range from 1:1 to :1 and preferably from 1:1 to 7:1. The sodium monomethylsiliconate can have a NazSi ratio from about 1:1 to 3:1 but the preferred material is that having a NazSi ratio of about 1:1.

The preferred composition to be employed in the processes of this invention is a composition consisting essentially of 1 mole of and 3 moles of acetic acid. Other preferred compositions are: a composition consisting essentially of 1 mole of H NCH CH NHCH CH CH Si(OCH and 1 mole of CH Si(OCI-I a composition consisting essentially of 1 mole of H NCH CH NI-HCH Si(OCH and 1 mole of C3H7SI(OCH3)3; a composition consisting essentially of 1 mole of H NCH CH NHCH CH CH Si(OCH 1 mole of CH Si(OCH and 3 moles of acetic acid. The preferred composition falling within the scope of composition (B) is a composition consisting essentially of 1 mole 4 of H' NCH CH NHCH CH CH Si(OCH and 1 mole of sodium monomethylsiliconate having a NazSi ratio of about 1:1.

The compositions of this invention are applied to the substrate or the polyolefin in liquid form in any convenient manner. By the term in liquid form it is meant that when the compositions per se are liquids they can be applied directly to the substrate or the compositions can be applied from a solvent solution whether they are liquids or solids. Preferably, the compositions are applied to the substrate in the form of a solvent solution employing any of the conventional techniques such as wiping, brushing or spraying.

Any solvent can be employed that has no. deleterious affect on the substrate or composition. Illustrative of the solvents that can be used are methyl alcohol, ethyl alcohol, propyl alcohols, butyl alcohols, hexane, heptane, naphtha mineral spirits, Stoddard solvent, toluene, perchloroethylene and water. Of these, isopropyl alcohol is the preferred solvent with a mixture of isopropyl alcohol and another solvent being next preferred. The compositions of this invention are employed in a concentration of about 0.1 to 10 percent by weight of the solvent and preferably in a concentration of about 1 to 5 percent.

The compositions of this invention are applied to the substrate to which the polyolefin is to be bonded or to the polyolefin or to both and then dried. The polyolefin is then laminated to the substrate by employing heat and pressure. Many suitable devices are avalaible which can be used for laminating the polyolefin to the substrate and are well known to those skilled in the art. The particular temperature and pressure employed will depend on the substrate and the polyolefin being bonded thereto.

The polyolefins can be bonded to any solid substrate such as metals, ceramics, siliceous or organic substrates employing the compositions of this invention. One might mention by way of illustration cellophane (cellulose sheets), Saran coated cellophane (Saran is copolymer of vinyl chloride and vinylidene chloride), Mylar (an ethylene glycol-terephthalate polyester), auminum foil, glassine paper, silicone treated parchment paper, cotton cloth, glass, ceramic tile, etc. In some instances, such as with Mylar and cellophane, the polyolefin must be laminated to both sides of the substrate, otherwise the substrate tends to swell, breaking the bond between the composition and substrate.

Any polyolefin can be adhered to the substrates employing the compositions of this invention. Specific examples of operative polyolefins are polyethylene, polystyrene, polypropylene, polyethylene-butylene copolymers, polyisoprene and butadiene-styrene copolymers.

In order that those skilled in the art can better understand how the present invention can be practiced, the following examples are given by way of illustration and not by way of limitation.

EXAMPLE 1 A one percent solution of the compositions set forth in Table I were prepared and applied to the substrate with a Kimwipe tissue. The materials were then allowed to air dry for 30 minutes. Then a two mil polyethylene film was laminated to the substrate with a Carver press. The temperature and pressure of the press vaiied with the substrate. The bond strength between the polyethylene film and the substrate was measured initially and after the laminate had been exposed for 24 hours to an atmosphere having a relative humidity of percent. This was done to determine the hydrolytic stability of the bond. The strength of the bond was measured by pulling the polyethylene film from one such strip of the laminate on a Keil Tester at an angle of to the surface of the substrate at a rate of 12 inches per minute. The force required to do this was determined by means of a spring balance and is expressed in grams per inch width of tape.

,5 The Keil Tester is described in TAPPI, vol. 43, No. 8, pages 164A and 165A (August 1960).

The glassine paper and cotton cloth laminates were prepared by molding for 10 seconds at a temperature of 160 C. and 2000 p.s.i. of pressure. All the other laminates were prepared by molding for 10 seconds at a temperature of 200 C. and 5000 p.s.i. The cellophane and Mylar substrates were coated on both sides with the polyethylene film. Under each substrate the initial bond strength is listed in the left hand column while thebond strength after 24 hours at 100 percent relative humidity is listed in the right hand column. The bond strengths are given in grams per inch.

6 EXAMPLE 3 TABLE I.ADHESION OF PCLYETHYLENE TO VARIOUS SUBSTRATES Silicone Saran-coated Aluminum Glassine treated Cotton Solvent Cellophane Cellophane Mylar foil paper parchment cloth Control 50 50 50 50 50 50 500 50 50 50 50 50 500 500 Composition:

1m0lH2NCH2CH2NH(CH2)a- Isopropyl 500 350 500 450 500 500 Si(OCH 1 mol sodium monoalcohol methylsiliconate Na:Si-1:1. and

water. 9 mols HQNGHZCH2NH(CH2)3- --.--d 500 250 Si(O 01103, 1 mol sodium monomethylsiliconate Na: Si-lz 1. 1m0lH2NCHzCH2NH(CH2)3- Isopropyl 500 250 Si(OCH 1 mol acetic acid. alcohol. 1 mol HzNCHzCHzNH(CH2)ad0 500 500 500 300 500 500 500 500 450 475 500 400 500 500 1 mol HzNCH2CH2NH(CH2)3- ....do 500 200 Si(OCH )a, 5 mols acetic acid. lmol H2NCHZCHZNH(CHZ)3- Isopropyl 500 250 .4

Si(OCH 3 mols acetic acid. alcohol and 7 water. 1 mol H2NCH2OE2NH(CH2)3- Water 500 200 Si(OCH 3 mols acetic acid. 1 mol H2NCH2CH2NH(CH2)3- Isopropyl 150 150 500 250 450 300 500 500 500 500 Si(O CH lmol CH3si(OCH3 3. alcohol.

1m0lHzNCH2CH2NH(CHz)3- Isopropyl 500 100 500 500 Si(OCHa)3, 1 mol oleic acid. alcohol and water 1In0lH NCHzCH2NH(CH2) do 500 150 500 500 -Si(OCH 1 mol benzoic acid. mO1H2NCH2CH2NHOH2CH' Isopropyl 500 300 (GE )CH;Si(OCH 3 mols alcohol. acetic acid. 1 mol HzN(CH2)3Si(OC2H5)3, d0 500 500 300 2 mols acetic acid. 1 mol (GH )2N(OH2)3Si(OCH Isopropyl 300 1 mol sodium monomethyb alcohol siliconate Na: Si-1;1. and water.

1 mol H NOH2CH2NH(CHz) Isopropyl 500 150 S'1(OCH 1 mol OH3SI(OCH3)5, alcohol. 3 mols acetic acid.

EXAMPLE 2 A composition consisting essentially of 1 mol of TABLE III H 3S1 CH3 3 Force Required to Break and 3 moles of acetic ac d was prepared. A 1 percent 5 Bond (g./m.) solution of this composition in isopropyl alcohol was- 10 min, 24 hrs then prepared andapphed to the substrates set forth in 0 0. at 100% Table II below with a Kimwipe. Then a film of polyethylcompostwn Imtlal water ene was bonded to the substrates as in Example 1. The lmole H2NCH2CH2NH( OH2)3SI bond strength between the polyethylene film and the 1 gg ggzggg ggffii %gg substrate was measured initially and after the laminate (OCHa)a,1rnole CaH1Si(OCH 500 300 350 had been immersed in boiling water for 5 minutes. The 5 8 8 2 55 500 100 100 bond strength was measured as in Example 1 and the re- 1l(n8l8g2)1 lC1H20lHN%(g/](183CS% 500 0 s a. moe i2 25 i s an." 2 0 sults are set forth in Table II. 1111016 rr NomcrrzNi-uoHaasi TABLE H 65 (001193, lmole ofin snooHm 500 2.50 350 Force Requiredto Break bond (g./in.)

5min: in Substrate Initial boiling water 7 0 Silicone treated parchment 400 250 gran-coated cellophane assine a er q Cotton d sti l 500 500 E MPLE 4 Aluminum foil 500 100 fielllophanem. Z288 338 When the compositions set forth in Table IV below y at are used instead of the compositions of Example 1, good adhesion of the polyethylene film to the substrate is obtained:

TABLE IV Concentration, Composition Percent Solvent 1 mol H2NCH2CH NH(CH2);Si(O CaHm, 1 lsopropyl 3 mols acetic acid. alcohol. 111101H2NCH(CH3)CHzNH(CHz)3S1 .25 D0.

( CH 3 mols acetic acid.

CH 2 Isopropyl l alcohol 1 mol HN(CH2)3S1(O 011 1 mol sodium and monomethylsiliconate, NazSi-1 :1. water.

1 mol H2N(CH2)3Si(OCH2CH OCHm, 1 5 Do.

mol C1H1 Si(O CHM, 2 mols acetic acid. 1 mol H2NGH2OH2NH CH2 3S1 5 Do.

(0 CHZCHZOHM, 3 mols propiornc acid.

CH 1 Isopropyl alcohol 1 11101 HzNCHzCH2NH(CH2) S1(O CH3) 2, and

3 mols formic acid. toluene.

1 mol H2N(CHz)4Si(O C Hm, 1 mol C2H Si 1. 5 Isopropyl O C: 5 alcohol 1 mol (CH3)2NCH2CH2NH(CH2)3Si 8. 75 Isopropyl (O C H 1 mol sodium monomethylalcohol silieonate, Na:Si-1:1. and

water. 3) 2:

1 mo1H NCH2CH NH(CH SiO CH 3 3 Do.

mols 2-ethylhexanoic acid.

1 mol HN(CH2)aSiO CH 1 mol sodium 1 Do.

monomethylsiliccnate N a:Si-1:1.

OH2OH2OF3 1 mol (CH )2N(CH2)sSi(O CH3) 2, 1 mol 2 Do.

sodium monomethylsiliconate Na:Si-1;1. 1 mol H NCH(CH3) CHzNHCfH2CH CHQ 1 Isopropyl CHzSi(O 011 3 mols acetic acid. alcohol.

CHzCHgCFa 1 11101H2NCH2CH2NH(OH2)3Si(OCH3)2, .75 D0.

1 11101C5H11Sl(0 CH3)3.

EXAMPLE 5 When the compositions of Example 1 are employed for adhering polypropylene, polystyrene, polyisoprene, butadiene-styrene copolymers, polyethylene-butylene copolymers to the various substrates, good adhesion is obtained.

EXAMPLE 6 When the compositions set forth in Table V below are employed instead of the compositions of Example 1, good adhesion of the polyethylene film to the substrate is obtained.

CQHE

1 131010 HzN CaH4Sl(O CH3); 2 moles acetic acid 1 mole HzNCsHm i(O 01192 2 moles acetic acid C 6H4 C 2115 1 mole CsH17Si(O CH 04 11 11 1 mole H2NCaH4CH2NH(CH3)3 i(O CH 3 moles propanoic acid CHaCaHs 1 mole H2NCeH 0NHCH2CH(CH3) CHzKO C1193 4 moles acetic acid 6 moles acetic acid 1 mole (CsH5)HN(CH2)aSi(O 0119 1 mole sodium monomcthylsiliconate 1 mole (OH C H4)HN(CH2)4Si(OCH 1 mole sodium monomethylsilicouate 2 moles (CsHsCH2)HN(CH2)3 i(O CHa)! 1 mole sodium monomethylsiliconate 1 mole (CcH11)HN(CHz) Si(O CH3); 1 mole sodium monomethylsiliconate 1 mole (C5H )HN(CH)3S1(O CH 1 mole sodium monomethylsiliconate 1 5 moles (CHz=CHCH2)HN(CH2)3Si(O CH3): 1 mole sodium monomethylsiliconate 1 mole H0 0 CH2CHzNH(CH2)zSi(O CH3); 1 mole sodium monomethylsiliconate That which is claimed is:

1. A process for adhering a polyolefin to a substrate which comprises applying to the substrate a composition in liquid form consisting essentially of a mixture of:

(1) a. silane having the general formula R is a divalent hydrocarbon radical free of aliphatic unsaturation and containing at least 3 carbon atoms,

Z is a member selected from the group consisting of hydrogen atoms and substituted monovalent hydrocarbon groups containing at least one H N-group and being free of aliphatic unsaturation,

R is a member selected from the group consisting of alkyl groups containing 1 to 4 carbon atoms, and the CH CH OH, CH CH OCH and groups,

R" is a member selected from the group consisting of monovalent hydrocarbon groups free of aliphatic unsaturation and fluorinated monovalent hydrocarbon groups free of aliphatic unsaturation in which all of the fluorine atoms are attached to at least the third carbon atom removed from the silicon atom,

a is an integer from O to 2 inclusive, and the Z N group is attached to at least the third carbon atom removed from the silicon atom, and

(2) silanes having the general formula R"Si(OR) wherein R' is a member selected from the group consisting of alkyl groups containing 1 to 18 carbon atoms and the phenyl group and R is as defined above, and the mole ratio of (1) to (2) being in the range of 2:1 to 1:3, drying the substrate and bonding the polyolefin to the substrate.

2. The process of claim 1 wherein (1) is selected from the group consisting of (1) and (2) being present in equimolar amounts.

3. The process of claim 2 wherein the polyolefin is polyethylene, the substrate is Saran coated cellophane and the composition is applied to the substrate as a solution in isopropyl alcohol.

4. The process of claim 1 wherein 1) is H NCH CH NH (CH Si OCH 3 and 9 and (2) is a mixture of CH Si(OCH andacetic acid, the mole ratio of (l) to CH Si'(OCH being about 1:1 and the mole ratio of (1) to the acid being about 1:3.

5. A process for adhering a polyolefin to a substrate which comprises applying to the substrate a composition in liquid form consisting essentially of a mixture of (l) a silanehaving the general formula R is a divalent hydrocarbon radical free of aliphatic unsaturation and containing at least 3 carbon atoms,

Y is a member selected from the group consisting of hydrogen atoms, amino-substituted. monovalent hydrocarbon groups free of aliphatic un- V saturation and monovalent hydrocarbon groups,

R is a member selected from the group consisting of alkyl groups containing 1 to 4 carbonatoms, and the CH CH OH, CH CH OCH3 and -CH CH OCH, CH groups,

-R" is a member selected from the group consisting of monovalent hydrocarbon groups free of aliphatic unsaturationand fluorinated monovalent hydrocarbon groups free of aliphatic unsaturation in which all of the fluorine atoms are attached to at least the third carbon atom removed from the silicon atom,

a is an integer from to 2 inclusive, and the Y N- group is attached to at least the third carbon atom removed from the silicon atom, and

(2) sodium monomethylsiliconate, drying the substrate and bonding the polyolefin to the substrate. *6. The process of claim 5 wherein (1) is selected firom the group consisting of and (e) (CH N(CH Si(OCH (2) has a NazSi ratio of about 1:1 and the mole ratio of (l) to (2) is about 1:1.

7. The process of claim 6 wherein the polyolefin is polyethylene, the substrate is Saran coated cellophane and the composition is applied to the substrate as a solution in a mixture of isopropyl alcohol and water.

8. A composition for adhering a polyolefin to a substrate consisting essentially of (1) and (2) CH Si(OCI-I in equimolar amounts.

9. A composition for adhering a polyolefin to a substrate consisting essentially of (l) and (2) C H Si(OCH in equimolar amounts.

10. A composition for adhering a polyolefin to a substrate consisting essentially of (1) and (2) C H Si(OCH in equimolar amounts.

11. A composition for adhering a polyolefin to a sub strate consisting essentially of '(1) and (2) a mixture of CH Si(OCH and acetic acid, the mole ratio of (1) to the CH Si(OCH being about 10 1:1 and the mole ratio of (1) to the acid being about 1:3.

12. A composition consisting essentially of (1) a silane having the general formula R is a divalent hydrocarbon radical free of aliphatic unsaturation and containing at least 3 carbon atoms,

Y is a member selected from the group consisting of hydrogen atoms, amino-substituted monovalent hydrocarbon groups free of aliphatic unsaturation and monovalent hydrocarbon groups,

R is a member selected from the group consisting of alkyl groups containing 1 to 4 carbon atoms, and the CH CH OH, -CH CH, OCH and -CH CH OCH CH groups,

R is a member selected from the group consisting of monovalent hydrocarbon groups free of aliphatic unsaturation and fluorinated monovalent hydrocarbon groups free of aliphatic unsaturation in which all of the fluorine atoms are attached to at least the third carbon atom removed from the silicon atom,

a is an integer from 0 to 2 inclusive, and the Y N group is attached to at least the third carbon atom removed from the silicon atom, and

(2) sodium monomethylsiliconate. 13. The composition of claim 12 wherein (1) is selected from the group consisting of (a) H NCH CH NH-( CH Si OCH 3 b) H NCH CH NHCH CH(CH CH Si OCH 3 and (c) H N(CH Si(OC H (2) has a NazSi ratio of about 1:1 and the mole ratio of (1) to (2) is about 1:1.

14. An article of manufacture comprising at least one layer of a polyolefin bonded to a substrate, there being between the polyolefin and substrate a dried composition consisting essentially of '(1) a silane having the general formula wherein:

R is a divalent hydrocarbon radical free of aliphatic unsaturation and containing at least 3 carbon atoms, Y is a member selected from the group consisting of hydrogen atoms, amino-substituted monovalent hydrocarbon groups free of aliphatic unsaturation and monovalent hydrocarbon groups,

R is a member selected from the group consisting of alkyl groups containing 1 to 4 carbon atoms, and the CH CH OH, CH CH OCH and -CH CH OCH CH groups,

R" is a member selected from the group consisting of monovalent hydrocarbon groups free of aliphatic unsaturation and fluorinated monovalent hydrocarbon groups free of aliphatic unsaturation in which all of the fluorine atoms are attached to at least the third carbon atom removed from the silicon atom,

a is an integer from 0 to 2 inclusive, and the Y N- group is attached to at least the third carbon atom removed from the silicon atom, and

(2) sodium monomethylsiliconate.

1 1 1 2 15. A composition for adhering a polyolefin through (2) a silane having the general formula RSi(OR) a substrate consisting essentially of a mixture of wherein:

( a Silane h g e gene a form a R' is a member selected from the group consist- RI! ing of alkyl groups containing 1 to 18 carbon I I atoms and the phenyl group and ZZNIFSKOB 5 R is as defined above, wherein: the mole ratio of (1) to (2) being in the range of 2:1

R is a divalent hydrocarbon radical free of aiito 1:3

phatic unsaturation and containing at least 3 References Cited carbon atoms, Z is a member selected from the group consisting 10 UNITED STATES PATENTS of hydrogen atoms and substituted monovalent 2,828,237 /1953 ROsSer 156-331 hydrocarbon groups containing at least one 2,832,754 4 9 cX t al- H N-group and being free of aliphatic unsatura- 2,919,059 12/1959 p fi 15 3,013,915 12/ 1961 Morgan. 1 R' is a member selected from the group consist- 88 3/1962 Eilermau 161-93 ing of alkyl groups containing 1 to 4 carbon 3,046,155 7/ 19 einkeatoms, and the -CI-I CH OH, CH CI-I 'OCI-I 3,158,519 11/ 1964 Shannon et a1. l56335 and -CH CH OCH CH groups, 4 0 1965 Eakins 156330 R" is a member selected from the group consist- 20 2,688,006 8/ 1954 tfi nman 156329 ing of monovalent hydrocarbon groups free of 3,074,904 I/ 9 3 Hlgashi 156329 aliphatic unsaturation and fiuorinated monova- 3,179,612 4/ 1965 Pl dcmann 156-329 lent hydrocarbon groups free of aliphatic unsaturation in which all of the fluorine atoms are HAROLD ANSHER Pnmary Exammel' attached to at least the third carbon atom re- 5 C COSBY Assistant Examiner moved from the silicon atom,

a is an integer from 0 to 2 inclusive and the Z N- group is attached to at least the third carbon 156-329; 252 137; 2 4 g atom removed from the silicon atom, and 

14. AN ARTICLE OF MANUFACTURE COMPRISING AT LEAST ONE LAYER OF A POLYOLEFIN BONDED TO A SUBSTRATE, THERE BEING BETWEEN THE POLYOLEFIN AND SUBSTRATE A DRIED COMPOSITION CONSISTING ESSENTIALLY OF (1) A SILANE HAVING THE GENERAL FORMULA 